Reprocessing through Co-precipitation of NCA Cathode Scrap Waste for Cathode Material of Li-Ion Battery

摘要

Lithium Nickel Aluminum Oxide, LiNi_(0,8)Co_(0,15)Al_(0,05)O_2, or LiNC A is one of the famous Lithium ion battery with high capacity and high energy density. During production of LiNC A batteries, scrap waste containing metals such as Cobalt Nickel and Aluminum was produced. This waste can't be released directly to environment and the metal contained had an economic value. The aim of the research was to recover the metals and reprocess to be material of LiNCA as cathode material of LiNCA batteries. The method used was hydrometallurgy consisting leaching and co-precipitation. The scrap was leached by sulfuric acid and assisted hydrogen peroxide in a certain time and temperature. The liquor of metal sulfate was the reacted with Sodium hydroxide. Hydroxide of metals formed was then precipitated by adding a chelating agent. The hydroxide of metals was finally reacted with lithium hydroxide for forming LiNCA in solid state. The product obtained was characterized XRD, FTIR and SEM as well as electrochemical performance analyzer. The result showed that the recovery of Nickel, Cobalt and Aluminum were 98,9843%, 97,3582%, 96,0579% respectively. XRD examination showed the product had the same the diffraction peaks of LiNCA, i.e. JCPDS #87-1562.